screensharing makes games unplayable

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screensharing makes games unplayable

14 November 2024, 06:58:34

Hi, I have an Artix dinit system running KDE plasma wayland on an AMD cpu and Nvidia gpu.
Whenever I try to screenshare a game, whether it be through one of the discord clients that support wayland screensharing like vesktop, or screensharing through firefox using discord on web, the game I screenshare becomes completely unplayable. Screensharing will cause the game to stutter like crazy, for every ~0.3 seconds of it running fine it will freeze for around ~1-2 seconds. I have noticed that for some reason this only happens if the game is the focused application and is running in fullscreen. If I continue to screenshare and simply alt-tab to focus on a different window, the game stops stuttering. If I make the game windowed, it stops stuttering. If I run the game under gamescope, it stops stuttering. I really have no clue what could be causing this, any help would be appreciated!

Re: screensharing makes games unplayable

Reply #1 – 14 November 2024, 10:05:09

could you provide some more basic info? what gpu? driver version? kernel version and params? pure gayland or xgayland app? do you have nvidia modules preloaded?
cat /etc/modprobe.d/nvidia.conf (or at least a file that modifies nvidia NVReg parameters) vs cat /proc/driver/nvidia/params?

Re: screensharing makes games unplayable

Reply #2 – 14 November 2024, 19:20:22

Quote from: Shoun2137 – on 14 November 2024, 10:05:09

could you provide some more basic info? what gpu? driver version? kernel version and params? pure gayland or xgayland app? do you have nvidia modules preloaded?
cat /etc/modprobe.d/nvidia.conf (or at least a file that modifies nvidia NVReg parameters) vs cat /proc/driver/nvidia/params?

My gpu is the 4080, on driver nvidia-open-dkms version 565.57.01-1

kernel is 6.11.7-artix1-1 with parameters of

Code: [Select]

BOOT_IMAGE=/boot/vmlinuz-linux root=UUID=e7fd22c2-4c03-492f-8f1b-f7db6fce0506 rw net.ifnames=0 quiet amd_iommu=on iommu=pt nvidia-drm.modeset=1 nvidia-drm.fbdev=1

application doing the screensharing is native wayland and application being screenshared I would assume is running under xwayland, thats the standard for basically every game isn't it?

I have this in my /etc/mkinitcpio.conf to preload the nvidia stuff

Code: [Select]

MODULES=(nvidia nvidia_modeset nvidia_uvm nvidia_drm)

Re: screensharing makes games unplayable

Reply #3 – 15 November 2024, 10:32:44

Code: [Select]

amd_iommu=on iommu=pt

This is enabled by default on any ryzen platform, so it's redundant.
You didn't provided:
cat /proc/driver/nvidia/params
and I assume you don't have anything nvidia related in /etc/modprobe.d/?
If you run pure wayland, you should route every game through valve's gamescope compositor.

Re: screensharing makes games unplayable

Reply #4 – 16 November 2024, 02:38:49

Quote from: Shoun2137 – on 15 November 2024, 10:32:44

Code: [Select]
amd_iommu=on iommu=pt
This is enabled by default on any ryzen platform, so it's redundant.
You didn't provided:
cat /proc/driver/nvidia/params
and I assume you don't have anything nvidia related in /etc/modprobe.d/?
If you run pure wayland, you should route every game through valve's gamescope compositor.

cat /proc/driver/nvidia/params

Code: [Select]

ResmanDebugLevel: 4294967295
RmLogonRC: 1
ModifyDeviceFiles: 1
DeviceFileUID: 0
DeviceFileGID: 0
DeviceFileMode: 438
InitializeSystemMemoryAllocations: 1
UsePageAttributeTable: 4294967295
EnableMSI: 1
EnablePCIeGen3: 0
MemoryPoolSize: 0
KMallocHeapMaxSize: 0
VMallocHeapMaxSize: 0
IgnoreMMIOCheck: 0
TCEBypassMode: 0
EnableStreamMemOPs: 0
EnableUserNUMAManagement: 1
NvLinkDisable: 0
RmProfilingAdminOnly: 1
PreserveVideoMemoryAllocations: 1
EnableS0ixPowerManagement: 0
S0ixPowerManagementVideoMemoryThreshold: 256
DynamicPowerManagement: 3
DynamicPowerManagementVideoMemoryThreshold: 200
RegisterPCIDriver: 1
EnablePCIERelaxedOrderingMode: 0
EnableResizableBar: 0
EnableGpuFirmware: 18
EnableGpuFirmwareLogs: 2
RmNvlinkBandwidthLinkCount: 0
EnableDbgBreakpoint: 0
OpenRmEnableUnsupportedGpus: 1
DmaRemapPeerMmio: 1
ImexChannelCount: 2048
CreateImexChannel0: 0
RegistryDwords: ""
RegistryDwordsPerDevice: ""
RmMsg: ""
GpuBlacklist: ""
TemporaryFilePath: "/var/tmp"
ExcludedGpus: ""

yes, /etc/modprobe.d/ is completely empty.

I would like this issue fixed without having to use gamescope since when I don't screenshare games work perfectly fine without gamescope and I get around a 20% performance loss when using gamescope.

Re: screensharing makes games unplayable

Reply #5 – 16 November 2024, 03:18:33

Hmmm, at this point this seems like more of an GSP <-> nvidia-open issue, could you try installing full proprietary package and disable GSP by creating a file:

Code: [Select]

# /etc/modprobe.d/nvidia.conf
# https://download.nvidia.com/XFree86/Linux-x86_64/565.57.01/README/gsp.html
options nvidia NVreg_EnableGpuFirmware=0

It's just for a test if it changes anything, you can switch back to nvidia-open and delete that file, because that'd mean it's just wayland shenanigans, and if it is actually a wayland issue then I'm out of ideas...

Also I'm not sure what 18 as a value means here, and from the what I got on reddit it seems like it forces GSP firmware to be always active in this mode on nvidia-open, so that's why I recommend trying going with nvidia-dkms instead.

Marking this one as offtopic, because it's performance related and just what I noticed on my GTX 1060:
Spoiler (click to show/hide)

I'm getting around 5-10 FPS more in Tekken 8 and framepacing is a lot more stable with those settings:

Code: [Select]

# References:
# https://wiki.archlinux.org/title/NVIDIA/Tips_and_tricks
# https://forums.developer.nvidia.com/t/does-modprobe-d-nvidia-conf-nvreg-enablestreammemops-need-to-be-set-for-gpudirect-to-work/79511
# Requires nvidia.ko >= 510.40.3 loaded with PeerMappingOverride=1. https://docs.nvidia.com/nvshmem/install-guide/index.html
# https://wiki.gentoo.org/wiki/NVIDIA/nvidia-drivers/en
# https://github.com/ventureoo/nvidia-tweaks
# https://nvdam.widen.net/s/k8vrp9xkft/tech-overview-magnum-io-1790750-r5-web
# https://developer.download.nvidia.com/devzone/devcenter/cuda/docs/GPUDirect_Technology_Overview.pdf
# https://docs.nvidia.com/nvshmem/pdf/NVSHMEM-Installation-Guide.pdf


# Explainations:
# https://github.com/NVIDIA/open-gpu-kernel-modules/blob/main/src/nvidia/interface/nvrm_registry.h
# https://github.com/NVIDIA/open-gpu-kernel-modules/blob/main/kernel-open/nvidia/nv-reg.h

options nvidia NVreg_EnableGpuFirmware=0 # Turing and above
options nvidia NVreg_EnableGpuFirmwareLogs=0 # Disable this for Pascal and Maxwell
options nvidia NVreg_UsePageAttributeTable=1
options nvidia NVreg_EnablePCIeGen3=1
options nvidia NVreg_EnableStreamMemOPs=1
options nvidia NVreg_RegistryDwords="PeerMappingOverride=1;"
options nvidia NVreg_EnableResizableBar=1 # Doesn't work on Pascal for some reason...
options nvidia NVreg_EnablePCIERelaxedOrderingMode=1
options nvidia NVreg_InitializeSystemMemoryAllocations=0

Re: screensharing makes games unplayable

Reply #6 – 16 November 2024, 07:53:14

Quote from: Shoun2137 – on 16 November 2024, 03:18:33

Hmmm, at this point this seems like more of an GSP <-> nvidia-open issue, could you try installing full proprietary package and disable GSP by creating a file:
Code: [Select]
# /etc/modprobe.d/nvidia.conf
# https://download.nvidia.com/XFree86/Linux-x86_64/565.57.01/README/gsp.html
options nvidia NVreg_EnableGpuFirmware=0
It's just for a test if it changes anything, you can switch back to nvidia-open and delete that file, because that'd mean it's just wayland shenanigans, and if it is actually a wayland issue then I'm out of ideas...

Also I'm not sure what 18 as a value means here, and from the what I got on reddit it seems like it forces GSP firmware to be always active in this mode on nvidia-open, so that's why I recommend trying going with nvidia-dkms instead.

Marking this one as offtopic, because it's performance related and just what I noticed on my GTX 1060:
Spoiler (click to show/hide)
I'm getting around 5-10 FPS more in Tekken 8 and framepacing is a lot more stable with those settings:
Code: [Select]
# References:
# https://wiki.archlinux.org/title/NVIDIA/Tips_and_tricks
# https://forums.developer.nvidia.com/t/does-modprobe-d-nvidia-conf-nvreg-enablestreammemops-need-to-be-set-for-gpudirect-to-work/79511
# Requires nvidia.ko >= 510.40.3 loaded with PeerMappingOverride=1. https://docs.nvidia.com/nvshmem/install-guide/index.html
# https://wiki.gentoo.org/wiki/NVIDIA/nvidia-drivers/en
# https://github.com/ventureoo/nvidia-tweaks
# https://nvdam.widen.net/s/k8vrp9xkft/tech-overview-magnum-io-1790750-r5-web
# https://developer.download.nvidia.com/devzone/devcenter/cuda/docs/GPUDirect_Technology_Overview.pdf
# https://docs.nvidia.com/nvshmem/pdf/NVSHMEM-Installation-Guide.pdf


# Explainations:
# https://github.com/NVIDIA/open-gpu-kernel-modules/blob/main/src/nvidia/interface/nvrm_registry.h
# https://github.com/NVIDIA/open-gpu-kernel-modules/blob/main/kernel-open/nvidia/nv-reg.h

options nvidia NVreg_EnableGpuFirmware=0 # Turing and above
options nvidia NVreg_EnableGpuFirmwareLogs=0 # Disable this for Pascal and Maxwell
options nvidia NVreg_UsePageAttributeTable=1
options nvidia NVreg_EnablePCIeGen3=1
options nvidia NVreg_EnableStreamMemOPs=1
options nvidia NVreg_RegistryDwords="PeerMappingOverride=1;"
options nvidia NVreg_EnableResizableBar=1 # Doesn't work on Pascal for some reason...
options nvidia NVreg_EnablePCIERelaxedOrderingMode=1
options nvidia NVreg_InitializeSystemMemoryAllocations=0

I swapped to nvidia-dkms instead of nvidia-open-dkms and added the nvidia.conf file with "options nvidia NVreg_EnableGpuFirmware=0" in the /etc/modprobe.d/ directory and the issue still persists, Thanks for trying at least.